Servlet实现用户请求次数的统计

骑猪看日落 2022-08-03 05:15 114阅读 0赞

利用会话机制统计用户访问服务器端的次数，每一次访问的时候，就将统计的数字+1，并保存在会话中。

/*************************
                  @Dream_EarFire
     ************************/
    package com.dream.javaweb;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class AccessServlet extends HttpServlet{
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = 1L;
    	public void  doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
    		this.doPost(request,response);
    	}
    	public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
    		response.setContentType("text/html;charset=utf-8");
    		int count=0;
    		if(request.getSession().getAttribute("count")!=null){
    			count=(Integer)request.getSession().getAttribute("count");
    		}
    		count++;
    		request.getSession().setAttribute("count", count);
    		PrintWriter out=response.getWriter();
    		out.println("<html>");
    		out.println("<head><title>A Servlet</title><body>");
    		out.println("This is the "+count+" time to access!");
    		out.println("</body>");
    		out.println("</html>");
    		out.flush();
    		out.close();
    	}
    }

web.xml的配置

<servlet>
      <servlet-name>AccessServlet</servlet-name>
      <servlet-class>com.dream.javaweb.AccessServlet</servlet-class>
      </servlet>
      <servlet-mapping>
      <servlet-name>AccessServlet</servlet-name>
      <url-pattern>/AccessServlet</url-pattern>
      </servlet-mapping>